Dresden 2006 – wissenschaftliches Programm
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O: Oberflächenphysik
O 14: Poster session I (Adsorption, Epitaxy and growth, Phase transitions, Surface reactions, Organic films, Electronic structure, Methods) (sponsored by Omicron Nanotechnology GmbH)
O 14.60: Poster
Montag, 27. März 2006, 18:00–21:00, P2
Electronic structure of pristine and Rb adsorbed VSe2 — •Michael Helle1, Matthias Frank1, Martin Marczynski1, Kai Rossnagel1, Lutz Kipp1, Anton Tadich2, Petar Stojanov2, Eric Huwald2, Nathaniel Janke-Gilman2, John Riley2, and Robert Leckey2 — 1Institut für Experimentelle und Angewandte Physik, Universität Kiel, D–24098, Germany — 2Physics Department, La Trobe University, Melbourne, Australia
An interesting and useful property of layered transition metal dichalcogenides is their ability to intercalate electron donating atoms between the layers. This can be exploited for storing alkali ions, e.g. like in battery cells as well as for the tayloring of the host electronic structure.
The aim of this work was to find out about electronic effects such as charge transfer and reduced band dispersions perpendicular to the layers induced by the deposition of alkali atoms, Rb in particular, on the surface of the layered charge density wave compound VSe2.
The electronic and geometric structures of VSe2 have been investigated in detail prior and after evaporation of Rb at room temperature by angle-resolved photoemission spectroscopy (ARPES) and low energy electron diffraction (LEED).
The ARPES data have been collected at BESSY II using a 2nd generation toroidal spectrometer developed by La Trobe University, Melbourne, Australia with an energy resolution of Δ E<0.2 eV and an angle resolution of Δ ϑ<0.5o.
This work is supported by DFG Forschergruppe FOR 353.